发明名称 |
Low input bias current chopping switch circuit and method |
摘要 |
A chopper-stabilized circuit (1) includes pre-chopping circuitry (26) for chopping an input signal (Vin) at a first frequency to generate a first signal. Input chopping circuitry (9) chops the first signal at a second frequency substantially greater than the first frequency to produce a second signal. The first frequency is a sub-harmonic of the second frequency. Post-chopping circuitry (30) chops the second chopped signal at the first frequency to produce a third signal that is applied to an input of a signal conditioning circuit (2). The output chopping circuitry (10) chops an output of the signal conditioning circuit at the second frequency to generate a fourth signal. The fourth signal is filtered. |
申请公布号 |
US8072262(B1) |
申请公布日期 |
2011.12.06 |
申请号 |
US20100803468 |
申请日期 |
2010.06.28 |
申请人 |
BURT RODNEY T.;ZHANG JOY Y.;TEXAS INSTRUMENTS INCORPORATED |
发明人 |
BURT RODNEY T.;ZHANG JOY Y. |
分类号 |
H03F1/02 |
主分类号 |
H03F1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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